io.h

linux-2.4.29操作系统的源码

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
 * Copyright (C) 2000 Ralf Baechle
 */
#ifndef _ASM_IA64_SN_IO_H
#define _ASM_IA64_SN_IO_H

#include <linux/config.h>

#include <asm/sn/addrs.h>

extern int numionodes;

/* Because we only have PCI I/O ports.  */
#define IIO_ITTE_BASE	0x400160	/* base of translation table entries */
#define IIO_ITTE(bigwin)	(IIO_ITTE_BASE + 8*(bigwin))

#define IIO_ITTE_OFFSET_BITS	5	/* size of offset field */
#define IIO_ITTE_OFFSET_MASK	((1<<IIO_ITTE_OFFSET_BITS)-1)
#define IIO_ITTE_OFFSET_SHIFT	0

#define IIO_ITTE_WIDGET_BITS	4	/* size of widget field */
#define IIO_ITTE_WIDGET_MASK	((1<<IIO_ITTE_WIDGET_BITS)-1)
#define IIO_ITTE_WIDGET_SHIFT	8

#define IIO_ITTE_IOSP		1	/* I/O Space bit */
#define IIO_ITTE_IOSP_MASK	1
#define IIO_ITTE_IOSP_SHIFT	12
#define HUB_PIO_MAP_TO_MEM	0
#define HUB_PIO_MAP_TO_IO	1

#define IIO_ITTE_INVALID_WIDGET	3	/* an invalid widget  */

#define IIO_ITTE_PUT(nasid, bigwin, io_or_mem, widget, addr) \
	REMOTE_HUB_S((nasid), IIO_ITTE(bigwin), \
		(((((addr) >> BWIN_SIZE_BITS) & \
		   IIO_ITTE_OFFSET_MASK) << IIO_ITTE_OFFSET_SHIFT) | \
		(io_or_mem << IIO_ITTE_IOSP_SHIFT) | \
		(((widget) & IIO_ITTE_WIDGET_MASK) << IIO_ITTE_WIDGET_SHIFT)))

#define IIO_ITTE_DISABLE(nasid, bigwin) \
	IIO_ITTE_PUT((nasid), HUB_PIO_MAP_TO_MEM, \
		     (bigwin), IIO_ITTE_INVALID_WIDGET, 0)

#define IIO_ITTE_GET(nasid, bigwin) REMOTE_HUB_ADDR((nasid), IIO_ITTE(bigwin))

/*
 * Macro which takes the widget number, and returns the
 * IO PRB address of that widget.
 * value _x is expected to be a widget number in the range
 * 0, 8 - 0xF
 */
#define	IIO_IOPRB(_x)	(IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
			(_x) : \
			(_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )

#include <asm/sn/sn2/shub.h>
#include <asm/sn/sn2/shubio.h>

/*
 * Used to ensure write ordering (like mb(), but for I/O space)
 */
extern void sn_mmiob(void);

#endif /* _ASM_IA64_SN_IO_H */